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This discussion covers reinforced frames, chassis modifications, powertrain updates, and emblem enhancements for the 2005 model. Detailed changes include thicker steel, upgraded shock valving, and heavy-duty components.
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Bob Fluck Program Engineer Manager 2005I 14050 Lb GVW RV CAB CHASSIS
Discussion Topics • Frame • Chassis • Powertrain • Emblem
Reinforcements to current frame Lower control arm cross member has thicker steel Plates added at box body mount holes Plates added at leaf spring attachment Inner channel added to rear axle kick up Frame
Chassis • 34mm rear sway bar add • Spring shackles made of higher grade steel • Higher rate front coil springs • Higher rate leaf springs • Revised valving in front and rear shocks • LT255 75R16E Tires
Powertrain • 6.OL, V8 (LQ4) standard engine (carryover) • HD 4L85E (NM8) transmission • Radiator with HD internal engine oil cooler • Auxiliary transmission oil cooler standard • HD Dana propshaft with larger U joint • Reinforced axle with thicker tubes and ribbing in center section.
Emblem • New Workhorse / GM / Vortex Engine emblem on fender
Design Changes for GMT610, MY 2005i, 14050 LBS GVW (New) DesignSpring Asm-RR. (Ref) PN 15035989 (Modified) New ValvingAbsorber Asm-RR Shk. (Ref) PN 25751139 New PNTires (Ref) PN 9594171 (Modified) Reinforces addedFrame Asm (Ref) PN 15238459 (159”) (Modified) ReinforcedShaft Asm-F&R Prop. (Ref) PN 15120401 (Modified) ReinforcedShackle Asm-RR Shk. (Ref) PN 25747407 (Modified) New ValvingAbsorber Asm-Frt Shk. (Ref) PN 25751141
Design Changes for GMT610, MY 2005i, 14050 LBS GVW(Cont). (New) Heavy duty applicationsMN8 Transmission Asm-Auto (Modified) More cooling capacityRadiator Assy PN 15127536 (New) Cooler Asm-Trans Fluid Aux. Added. PN 15751207 (New) Reinforced Housing & GearsAxle Asm-RR (4.10 Ratio) (Brand New) Stabilizer Asm-RR